
Markel RK120EAA Wall Thermostat
The Markel RK120EAA Wall Thermostat is a professional-grade low voltage heat only thermostat engineered for precise climate control in commercial and industrial environments. This analog wall-mounted thermostat is highly versatile, supporting both 24VAC and millivolt systems, making it a reliable choice for retrofitting older equipment or installing new fan-forced unit heaters. It features sealed contacts for enhanced longevity in demanding conditions and a mercury-free design that requires no leveling during installation. With a standard 50-90°F temperature range and both Fahrenheit and Celsius scales, it provides a 1.0 Amp maximum rating for efficient pilot or relay triggering. The mechanical positive off switch ensures the system remains completely inactive when required, preventing unnecessary cycling. Designed for heat only applications, this unit integrates seamlessly with TPI and Markel heating products, utilizing R and W terminals for a standard two-wire setup.
Key Benefits- Dual system compatibility allows for use with standard 24V HVAC controls or millivolt heating systems.
- Sealed contacts protect internal components from dust and debris, ensuring reliable HVAC temperature regulation.
- Mercury-free construction provides an environmentally safe solution that does not require precise leveling during the mounting process.
- Integrated heat anticipator maintains a tight temperature differential (2-3°F) to prevent overshooting setpoints.
- Positive off setting offers a physical disconnect to ensure the heating system remains shut down during the off-season.
Is the Markel RK120EAA compatible with millivolt systems?
Yes, this unit is specifically rated for both 24VAC and millivolt (MV) heating applications, making it compatible with floor furnaces and wall heaters that operate without external power.
Does this thermostat require a common (C) wire?
No, as a mechanical heat-only thermostat, it typically operates on a simple two-wire (R and W) configuration and does not require a common wire for operation.
Can I use this thermostat for a cooling-only or AC system?
This model is designed strictly for heating-only applications and does not feature the internal switching or terminals necessary for cooling control.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $30.49
-65%$30.49
$10.67Markel RK120EAA Wall Thermostat
The Markel RK120EAA Wall Thermostat is a professional-grade low voltage heat only thermostat engineered for precise climate control in commercial and industrial environments. This analog wall-mounted thermostat is highly versatile, supporting both 24VAC and millivolt systems, making it a reliable choice for retrofitting older equipment or installing new fan-forced unit heaters. It features sealed contacts for enhanced longevity in demanding conditions and a mercury-free design that requires no leveling during installation. With a standard 50-90°F temperature range and both Fahrenheit and Celsius scales, it provides a 1.0 Amp maximum rating for efficient pilot or relay triggering. The mechanical positive off switch ensures the system remains completely inactive when required, preventing unnecessary cycling. Designed for heat only applications, this unit integrates seamlessly with TPI and Markel heating products, utilizing R and W terminals for a standard two-wire setup.
Key Benefits- Dual system compatibility allows for use with standard 24V HVAC controls or millivolt heating systems.
- Sealed contacts protect internal components from dust and debris, ensuring reliable HVAC temperature regulation.
- Mercury-free construction provides an environmentally safe solution that does not require precise leveling during the mounting process.
- Integrated heat anticipator maintains a tight temperature differential (2-3°F) to prevent overshooting setpoints.
- Positive off setting offers a physical disconnect to ensure the heating system remains shut down during the off-season.
Is the Markel RK120EAA compatible with millivolt systems?
Yes, this unit is specifically rated for both 24VAC and millivolt (MV) heating applications, making it compatible with floor furnaces and wall heaters that operate without external power.
Does this thermostat require a common (C) wire?
No, as a mechanical heat-only thermostat, it typically operates on a simple two-wire (R and W) configuration and does not require a common wire for operation.
Can I use this thermostat for a cooling-only or AC system?
This model is designed strictly for heating-only applications and does not feature the internal switching or terminals necessary for cooling control.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Shipping & Returns
Description
The Markel RK120EAA Wall Thermostat is a professional-grade low voltage heat only thermostat engineered for precise climate control in commercial and industrial environments. This analog wall-mounted thermostat is highly versatile, supporting both 24VAC and millivolt systems, making it a reliable choice for retrofitting older equipment or installing new fan-forced unit heaters. It features sealed contacts for enhanced longevity in demanding conditions and a mercury-free design that requires no leveling during installation. With a standard 50-90°F temperature range and both Fahrenheit and Celsius scales, it provides a 1.0 Amp maximum rating for efficient pilot or relay triggering. The mechanical positive off switch ensures the system remains completely inactive when required, preventing unnecessary cycling. Designed for heat only applications, this unit integrates seamlessly with TPI and Markel heating products, utilizing R and W terminals for a standard two-wire setup.
Key Benefits- Dual system compatibility allows for use with standard 24V HVAC controls or millivolt heating systems.
- Sealed contacts protect internal components from dust and debris, ensuring reliable HVAC temperature regulation.
- Mercury-free construction provides an environmentally safe solution that does not require precise leveling during the mounting process.
- Integrated heat anticipator maintains a tight temperature differential (2-3°F) to prevent overshooting setpoints.
- Positive off setting offers a physical disconnect to ensure the heating system remains shut down during the off-season.
Is the Markel RK120EAA compatible with millivolt systems?
Yes, this unit is specifically rated for both 24VAC and millivolt (MV) heating applications, making it compatible with floor furnaces and wall heaters that operate without external power.
Does this thermostat require a common (C) wire?
No, as a mechanical heat-only thermostat, it typically operates on a simple two-wire (R and W) configuration and does not require a common wire for operation.
Can I use this thermostat for a cooling-only or AC system?
This model is designed strictly for heating-only applications and does not feature the internal switching or terminals necessary for cooling control.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












